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    • Question

      Find the difference between angle and its complement if

      the angle is five-thirteenth of its complement.
      A 30° Correct Answer Incorrect Answer
      B 40° Correct Answer Incorrect Answer
      C 42° Correct Answer Incorrect Answer
      D 45° Correct Answer Incorrect Answer

      Solution

      Let the angle be 'A'.

      Complement of 'A' = 90° - A

      So, 'A' = (5/13) X (90° - A)

      Or, 13A = 450° - 5A

      Or, 18A = 450°

      Or, 'A' = 25°

      Complement of 'A' = 90° - 25° = 65°

      Required difference = 65° - 25° = 40°

      Hence, option b.

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